Blog post on packaging 2021

[henryiii]

Here's a useful blogpost on the state of packaging in 2021:

https://labs.quansight.org/blog/2021/01/python-packaging-brainstorm/

Sadly don't even mention cibuildwheel, but lots of useful things and mentions there.

[henryiii]

I found this very likely useful: SciPy provides a metapackage with oldest NumPy supported on various systems for building. https://github.com/scipy/oldest-supported-numpy/blob/master/setup.cfg

Great for Cython projects, perhaps? @deepcharles This might simplify things? Though it's 3.5+ only, so anyone supporting 2.7 will have to list both numpy 2.7 and this metapackage for 3+ with environment markers still. I'll probably try it out on a couple of our Cython packages and update the page here in the near future: https://scikit-hep.org/developer/packaging#special-additions-numpy

[deepcharles]

Thanks, this is indeed very useful. We have added it in this PR.

[henryiii]

We are updating our example with this too in #567 :)